[RFC PATCH 03/10] nfp: Replace nfp_pr_et with ethtool_gsprintf

[Alexander Duyck <alexander.duyck@gmail.com>]

From: Alexander Duyck <alexanderduyck@fb.com>

The nfp_pr_et function is nearly identical to ethtool_gsprintf except for
the fact that it passes the pointer by value and as a return whereas
ethtool_gsprintf passes it as a pointer.

Since they are so close just update nfp to make use of ethtool_gsprintf

Signed-off-by: Alexander Duyck <alexanderduyck@fb.com>
---
 drivers/net/ethernet/netronome/nfp/abm/main.c      |    4 +
 .../net/ethernet/netronome/nfp/nfp_net_ethtool.c   |   79 +++++++++-----------
 drivers/net/ethernet/netronome/nfp/nfp_port.h      |    2 -
 3 files changed, 36 insertions(+), 49 deletions(-)

diff --git a/drivers/net/ethernet/netronome/nfp/abm/main.c b/drivers/net/ethernet/netronome/nfp/abm/main.c
index bdbf0726145e..3e8a9a7d7327 100644
--- a/drivers/net/ethernet/netronome/nfp/abm/main.c
+++ b/drivers/net/ethernet/netronome/nfp/abm/main.c
@@ -419,8 +419,8 @@ nfp_abm_port_get_stats_strings(struct nfp_app *app, struct nfp_port *port,
 		return data;
 	alink = repr->app_priv;
 	for (i = 0; i < alink->vnic->dp.num_r_vecs; i++) {
-		data = nfp_pr_et(data, "q%u_no_wait", i);
-		data = nfp_pr_et(data, "q%u_delayed", i);
+		ethtool_gsprintf(&data, "q%u_no_wait", i);
+		ethtool_gsprintf(&data, "q%u_delayed", i);
 	}
 	return data;
 }
diff --git a/drivers/net/ethernet/netronome/nfp/nfp_net_ethtool.c b/drivers/net/ethernet/netronome/nfp/nfp_net_ethtool.c
index 9c9ae33d84ce..33097c411d7d 100644
--- a/drivers/net/ethernet/netronome/nfp/nfp_net_ethtool.c
+++ b/drivers/net/ethernet/netronome/nfp/nfp_net_ethtool.c
@@ -429,17 +429,6 @@ static int nfp_net_set_ringparam(struct net_device *netdev,
 	return nfp_net_set_ring_size(nn, rxd_cnt, txd_cnt);
 }
 
-__printf(2, 3) u8 *nfp_pr_et(u8 *data, const char *fmt, ...)
-{
-	va_list args;
-
-	va_start(args, fmt);
-	vsnprintf(data, ETH_GSTRING_LEN, fmt, args);
-	va_end(args);
-
-	return data + ETH_GSTRING_LEN;
-}
-
 static unsigned int nfp_vnic_get_sw_stats_count(struct net_device *netdev)
 {
 	struct nfp_net *nn = netdev_priv(netdev);
@@ -454,29 +443,29 @@ static u8 *nfp_vnic_get_sw_stats_strings(struct net_device *netdev, u8 *data)
 	int i;
 
 	for (i = 0; i < nn->max_r_vecs; i++) {
-		data = nfp_pr_et(data, "rvec_%u_rx_pkts", i);
-		data = nfp_pr_et(data, "rvec_%u_tx_pkts", i);
-		data = nfp_pr_et(data, "rvec_%u_tx_busy", i);
+		ethtool_gsprintf(&data, "rvec_%u_rx_pkts", i);
+		ethtool_gsprintf(&data, "rvec_%u_tx_pkts", i);
+		ethtool_gsprintf(&data, "rvec_%u_tx_busy", i);
 	}
 
-	data = nfp_pr_et(data, "hw_rx_csum_ok");
-	data = nfp_pr_et(data, "hw_rx_csum_inner_ok");
-	data = nfp_pr_et(data, "hw_rx_csum_complete");
-	data = nfp_pr_et(data, "hw_rx_csum_err");
-	data = nfp_pr_et(data, "rx_replace_buf_alloc_fail");
-	data = nfp_pr_et(data, "rx_tls_decrypted_packets");
-	data = nfp_pr_et(data, "hw_tx_csum");
-	data = nfp_pr_et(data, "hw_tx_inner_csum");
-	data = nfp_pr_et(data, "tx_gather");
-	data = nfp_pr_et(data, "tx_lso");
-	data = nfp_pr_et(data, "tx_tls_encrypted_packets");
-	data = nfp_pr_et(data, "tx_tls_ooo");
-	data = nfp_pr_et(data, "tx_tls_drop_no_sync_data");
-
-	data = nfp_pr_et(data, "hw_tls_no_space");
-	data = nfp_pr_et(data, "rx_tls_resync_req_ok");
-	data = nfp_pr_et(data, "rx_tls_resync_req_ign");
-	data = nfp_pr_et(data, "rx_tls_resync_sent");
+	ethtool_gsprintf(&data, "hw_rx_csum_ok");
+	ethtool_gsprintf(&data, "hw_rx_csum_inner_ok");
+	ethtool_gsprintf(&data, "hw_rx_csum_complete");
+	ethtool_gsprintf(&data, "hw_rx_csum_err");
+	ethtool_gsprintf(&data, "rx_replace_buf_alloc_fail");
+	ethtool_gsprintf(&data, "rx_tls_decrypted_packets");
+	ethtool_gsprintf(&data, "hw_tx_csum");
+	ethtool_gsprintf(&data, "hw_tx_inner_csum");
+	ethtool_gsprintf(&data, "tx_gather");
+	ethtool_gsprintf(&data, "tx_lso");
+	ethtool_gsprintf(&data, "tx_tls_encrypted_packets");
+	ethtool_gsprintf(&data, "tx_tls_ooo");
+	ethtool_gsprintf(&data, "tx_tls_drop_no_sync_data");
+
+	ethtool_gsprintf(&data, "hw_tls_no_space");
+	ethtool_gsprintf(&data, "rx_tls_resync_req_ok");
+	ethtool_gsprintf(&data, "rx_tls_resync_req_ign");
+	ethtool_gsprintf(&data, "rx_tls_resync_sent");
 
 	return data;
 }
@@ -550,19 +539,19 @@ nfp_vnic_get_hw_stats_strings(u8 *data, unsigned int num_vecs, bool repr)
 	swap_off = repr * NN_ET_SWITCH_STATS_LEN;
 
 	for (i = 0; i < NN_ET_SWITCH_STATS_LEN; i++)
-		data = nfp_pr_et(data, nfp_net_et_stats[i + swap_off].name);
+		ethtool_gsprintf(&data, nfp_net_et_stats[i + swap_off].name);
 
 	for (i = NN_ET_SWITCH_STATS_LEN; i < NN_ET_SWITCH_STATS_LEN * 2; i++)
-		data = nfp_pr_et(data, nfp_net_et_stats[i - swap_off].name);
+		ethtool_gsprintf(&data, nfp_net_et_stats[i - swap_off].name);
 
 	for (i = NN_ET_SWITCH_STATS_LEN * 2; i < NN_ET_GLOBAL_STATS_LEN; i++)
-		data = nfp_pr_et(data, nfp_net_et_stats[i].name);
+		ethtool_gsprintf(&data, nfp_net_et_stats[i].name);
 
 	for (i = 0; i < num_vecs; i++) {
-		data = nfp_pr_et(data, "rxq_%u_pkts", i);
-		data = nfp_pr_et(data, "rxq_%u_bytes", i);
-		data = nfp_pr_et(data, "txq_%u_pkts", i);
-		data = nfp_pr_et(data, "txq_%u_bytes", i);
+		ethtool_gsprintf(&data, "rxq_%u_pkts", i);
+		ethtool_gsprintf(&data, "rxq_%u_bytes", i);
+		ethtool_gsprintf(&data, "txq_%u_pkts", i);
+		ethtool_gsprintf(&data, "txq_%u_bytes", i);
 	}
 
 	return data;
@@ -610,15 +599,15 @@ static u8 *nfp_vnic_get_tlv_stats_strings(struct nfp_net *nn, u8 *data)
 			memcpy(data, nfp_tlv_stat_names[id], ETH_GSTRING_LEN);
 			data += ETH_GSTRING_LEN;
 		} else {
-			data = nfp_pr_et(data, "dev_unknown_stat%u", id);
+			ethtool_gsprintf(&data, "dev_unknown_stat%u", id);
 		}
 	}
 
 	for (i = 0; i < nn->max_r_vecs; i++) {
-		data = nfp_pr_et(data, "rxq_%u_pkts", i);
-		data = nfp_pr_et(data, "rxq_%u_bytes", i);
-		data = nfp_pr_et(data, "txq_%u_pkts", i);
-		data = nfp_pr_et(data, "txq_%u_bytes", i);
+		ethtool_gsprintf(&data, "rxq_%u_pkts", i);
+		ethtool_gsprintf(&data, "rxq_%u_bytes", i);
+		ethtool_gsprintf(&data, "txq_%u_pkts", i);
+		ethtool_gsprintf(&data, "txq_%u_bytes", i);
 	}
 
 	return data;
@@ -666,7 +655,7 @@ static u8 *nfp_mac_get_stats_strings(struct net_device *netdev, u8 *data)
 		return data;
 
 	for (i = 0; i < ARRAY_SIZE(nfp_mac_et_stats); i++)
-		data = nfp_pr_et(data, "mac.%s", nfp_mac_et_stats[i].name);
+		ethtool_gsprintf(&data, "mac.%s", nfp_mac_et_stats[i].name);
 
 	return data;
 }
diff --git a/drivers/net/ethernet/netronome/nfp/nfp_port.h b/drivers/net/ethernet/netronome/nfp/nfp_port.h
index d7fd203bb180..ae4da189d955 100644
--- a/drivers/net/ethernet/netronome/nfp/nfp_port.h
+++ b/drivers/net/ethernet/netronome/nfp/nfp_port.h
@@ -92,8 +92,6 @@ struct nfp_port {
 
 extern const struct ethtool_ops nfp_port_ethtool_ops;
 
-__printf(2, 3) u8 *nfp_pr_et(u8 *data, const char *fmt, ...);
-
 int nfp_port_setup_tc(struct net_device *netdev, enum tc_setup_type type,
 		      void *type_data);